But earlier, a domestic fight in one of the units on the 1600 block of Sunset Avenue ended in death for Elsy Pacheco, 25, and her estranged husband, Hector Guerrero, 30.

Guerrero returned from a trip and found Pacheco with a boyfriend, said Waukegan Deputy Police Chief Miguel Juarez. The couple, separated since February, had apparently fought earlier Saturday, Juarez said.

Police believe Guerrero left Pacheco's apartment after the argument, but returned later with a revolver. Her boyfriend had apparently been present at the afternoon confrontation but had left by the time Guerrero came back, Juarez said.

A bent screen on a bedroom window has led police to believe Guerrero forced his way into the apartment.

Guerrero apparently proceeded to fatally shoot Pacheco, then himself, Juarez said, adding that there were no physical signs of struggle.

There appears not to have been anyone else present at the time of the incident, Juarez said, but residents in neighboring units heard shots and called police.

Pacheco was brought to St. Therese Medical Center in Waukegan, where she was pronounced dead from a gunshot wound to the head, said Lake County Coroner Barbara Richardson. Guerrero was pronounced dead at the scene from the same cause, Richardson said.